import bson
import pymongo
import redis
from elasticsearch import Elasticsearch
from pymongo.uri_parser import SCHEME
from rediscluster import RedisCluster

from config.load import mongo_conf, redis_conf, es_conf, redis_startup_nodes

# ---------------------------------- mongo ----------------------------------
MONGO_URI_CLIENTS = {}    # a dictionary hold all client with uri as key


def mongo_client(host=None, port=None, fork=False, **kwargs):
    if host is None:
        host = mongo_conf["host"]
    if port is None:
        port = mongo_conf["port"]

    if host is not None and host.startswith(SCHEME):
        uri = host
    else:
        uri = f'mongodb://{host}:{port}'

    if fork:
        return pymongo.MongoClient(uri, **kwargs)

    global MONGO_URI_CLIENTS
    matched_client = MONGO_URI_CLIENTS.get(uri)
    if matched_client is None:
        new_client = pymongo.MongoClient(uri, **kwargs)
        if new_client is not None:
            MONGO_URI_CLIENTS[uri] = new_client
        return new_client
    return matched_client


def mongo_database(name: str, **kw):
    client = mongo_client(**kw)
    return client.get_database(name)


def mongo_table(db: str, name: str, **kw):
    database = mongo_database(db, **kw)
    return database.get_collection(name)


def int2long(param: int):
    """int 转换成 long """
    return bson.int64.Int64(param)


def object_id(_id: str):
    return bson.objectid.ObjectId(_id)


# ---------------------------------- es ----------------------------------
def es_client(cfg=None):
    if cfg is None:
        cfg = es_conf
    return Elasticsearch([{"host": cfg['host'], "port": cfg['port']}])


def es_query(title: str, publish_time: int):
    """
    查询es

    :param title: 标题
    :param publish_time: 发布时间
    :return:
    """
    client = es_client()
    stime = publish_time - 432000  # 往前推5天
    etime = publish_time + 432000
    # 通过发布标题和发布时间范围查询
    query = {
        "query": {
            "bool": {
                "must": [
                    {
                        "multi_match": {
                            "query": title,
                            "type": "phrase",
                            "fields": ["title"]
                        }
                    },
                    {"range": {'publishtime': {"from": stime, "to": etime}}}
                ]
            }
        }
    }
    result = client.search(index=es_conf['db'], body=query, request_timeout=100)
    total = int(result['hits']['total'])
    return total


# ---------------------------------- redis ----------------------------------
def redis_client(cfg=None):
    if cfg is None:
        cfg = redis_conf
    pool = redis.ConnectionPool(
        host=cfg['host'],
        port=cfg['port'],
        password=cfg['pwd'],
        db=cfg['db']
    )
    return redis.Redis(connection_pool=pool, decode_responses=True)


def redis_cluster():
    startup_nodes = redis_startup_nodes
    return RedisCluster(startup_nodes=startup_nodes, decode_responses=True)